140668671 has 36 divisors (see below), whose sum is σ = 223334664. Its totient is φ = 78661440.

The previous prime is 140668657. The next prime is 140668673. The reversal of 140668671 is 176866041.

It is a happy number.

It is not a de Polignac number, because 140668671 - 2⁷ = 140668543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140668673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 60201 + ... + 62493.

Almost surely, 2^140668671 is an apocalyptic number.

140668671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

140668671 is a deficient number, since it is larger than the sum of its proper divisors (82665993).

140668671 is a wasteful number, since it uses less digits than its factorization.

140668671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344 (or 2320 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 140668671 is about 11860.3824137335. The cubic root of 140668671 is about 520.0747809119.

The spelling of 140668671 in words is "one hundred forty million, six hundred sixty-eight thousand, six hundred seventy-one".